METAL PRODUCING ELECTROLYTIC CELL

• Main Authors: KOSEMURA SUSUMU, TAKAHASHI HIROYUKI
• Format: Patent
• Language: English
• Published: 16.04.1993
• Subjects: APPARATUS THEREFOR; CHEMISTRY; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; METALLURGY; PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS

PURPOSE:To efficiently produce a metal with the contamination reduced by surrounding a cathode piercing the wall dipped in an electrolyte with an aluminum electroformed insulating refractory under specified conditions in the bipolar electrolytic cell. CONSTITUTION:Plural cathodes 2 piercing the insulating wall 4 dipped in an electrolyte is surrounded in the wall 4 with an insulating refractory 21 consisting of an alumina electroformed refractory contg. >=95wt.% alumina wherein beta-alumina is controlled to <10wt.% of the total alumina and having <=1.0% apparent porosite. The refractory 21 is arranged extending outward in the longitudinal direction of the cathode 2 from the face (a) in contact with the electrolyte slightly outside the position where the temp. in the wall is lowered to the m.p. of the electrolyte and extending in the cross direction to the thickness of 1/3 to 1/5 of the distance (d) between the cathode faces. Consequently, the quality of the metal produced at the start of operation is maintained even after a long-period operation, and the efficiency of the electrolytic cell is kept high.